Still struggling with Suburban NT32 furnace
The furnace would light and heat for a while and then go out. I changed the thermal limit switch and that seemed to fix it for a while. Now it only lights occasionally and almost never relights a...
Forum Discussion
On an older unit, you will get a bit of voltage drop through the thermostat, limit switch. sail switch, and maybe connections. Often replacing one of these items will let the unit work, but all of the other items can still be causing the voltage drop.
If you have not done so, I would start by replacing the thermostat.
People often say- "It can't be the thermostat, because the blower comes on."
9 volts is enough to trigger the fan replay, which will start the blower, but it is not enough to "fire" the electronics.
To be certain what the problem is would require bench testing.
If you have not done so, I would start by replacing the thermostat.
People often say- "It can't be the thermostat, because the blower comes on."
9 volts is enough to trigger the fan replay, which will start the blower, but it is not enough to "fire" the electronics.
To be certain what the problem is would require bench testing.
